tests: don't patch private ops class

[tonyandrewmeyer]

Issue

The tests currently patch a private ops class. The private names have no compatibility guarantee, and this will stop working in an upcoming ops release.

Solution

Remove the patching, which is not required in modern ops. Also update the expect default IP (from Cloudflare's DNS server, which we shouldn't be using anyway).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.44%. Comparing base (e7c1809) to head (37e6a01).
Report is 70 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #519      +/-   ##
==========================================
- Coverage   66.25%   65.44%   -0.82%     
==========================================
  Files          17       18       +1     
  Lines        3180     4092     +912     
  Branches      424      588     +164     
==========================================
+ Hits         2107     2678     +571     
- Misses        935     1205     +270     
- Partials      138      209      +71     

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[shayancanonical]

🚀

[taurus-forever]

Dear @tonyandrewmeyer , thank you for the contribution!
Good to hear it is no longer necessary!!!

P.S. should we share this information locally OR you are going to patch all those repos:

14:23:00 ✔ taurus:~/canonical/git/$ rg patch_network_get . | awk -F'/' '{print $2}' | uniq
mysql-operator
pgbouncer-operator
postgresql-operator
postgresql-k8s-operator
s3-integrator
mongodb-operator
mongodb-k8s-operator
opensearch-operator

[tonyandrewmeyer]

P.S. should we share this information locally OR you are going to patch all those repos:

14:23:00 ✔ taurus:~/canonical/git/$ rg patch_network_get . | awk -F'/' '{print $2}' | uniq
mysql-operator
pgbouncer-operator
postgresql-operator
postgresql-k8s-operator
s3-integrator
mongodb-operator
mongodb-k8s-operator
opensearch-operator

I've opened PRs for prometheus-k8s-operator, grafana-k8s-operator, postgresql-operator, postgresql-k8s-operator/pull/692, and (obviously) mysql-operator. My hope was to let the others (I have a list of 12 that I could find) know and let teams do the fix themselves, if possible.